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Economic SYNOPSES
short essays and reports on the economic issues of the day
2007 ■ Number 17

Stable Interest Rates Follow Stable Prices
William T. Gavin
n the 1980s, the United States and most other developed
from a low of 0.90 percent to a high of 6.36 percent, which
countries adopted monetary policies based on the goal
was the average in the earlier period. At the long end, the
of first achieving, and then maintaining, price stability.
yield on 10-year bonds has averaged 5.02 percent and, on a
Price stability can be defined as an economic environment
monthly average basis, has never risen as high as 7 percent.
in which people can make plans and contracts without worAnother benefit of price stability is that it stabilizes
rying about inflation. Interest rates are a good indicator of
people’s expectations about inflation. Hence, indications
expectations about future inflation because most long-term
of strong economic growth are less likely to foment expecshifts in the level of interest rates are due to changes in the
tations of a long-lasting shift in the inflation rate. Also,
market’s expectations about future inflation.
under price stability, monetary policymakers are less comDuring the long period of achieving price stability in
pelled to quell inflation fears during periods of fast economic
the United States—from about 1983 until the mid-1990s—
growth by raising short-term interest rates. The table illusinterest rates declined. In 1984, the yields on the 3-month
trates this benefit by showing the average monthly standard
Treasury bill and the 10-year bond peaked at 10.90 percent
deviations of the respective interest rates, calculated from
and 13.56 percent, respectively. By 1993, the yield on the
daily data. This measure shows that expectations in the
3-month bill had fallen to 3 percent and the yield on the
current era of price stability have been well anchored—
10-year bond dipped to 5.33 percent. Since the mid-1990s,
that is, intra-month developments, such as data releases,
inflation and interest rates have been relatively stable, reflecthave less effect on interest rates. ■
ing the relative success of monetary policy in maintaining
price stability.
The table shows statistics for short- and
long-term interest rates for two periods. The
U.S. Treasury Constant-Maturity Yields (% annual rates)
first period, from January 1983 until December
Term to maturity
3-Month
1-Year
5-Year
10-Year
1996, is one of declining inflation and inflation
expectations. The average 3-month interest rate
1983:01 to 1996:12
over this period was 6.36 percent and the average
Average
6.36
6.87
7.98
8.35
10-year rate was 8.35 percent.
Minimum
2.93
3.18
4.71
5.33
The second period, from January 1997 to
Maximum
10.90
12.08
13.48
13.56
the present, is one of relative price stability. A
Monthly standard deviation
0.11
0.12
0.14
0.13
1997:01 to 2007:04
comparison of the two periods clearly shows the
Average
3.69
3.94
4.66
5.02
advantage of price stability: Interest rates shown
Minimum
0.90
1.01
2.27
3.33
in the bottom panel are, on average, 2 to 3 perMaximum
6.36
6.33
6.76
6.89
centage points lower across all maturities, with
Monthly
standard
deviation
0.06
0.07
0.10
0.10
the largest declines in the longest maturities. At
the short end, monthly average rates have varied

I

Views expressed do not necessarily reflect official positions of the Federal Reserve System.

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